Pantograph apparatus



G. S. TIFFANY.

PANTOGRAPH APPARATUS.

APPLICATION men FEB. I, ma.

Patented Feb. 28,1922.

2 SHEETS-SHEET 1- 1 MiG 8,045.

G. S. TIFFANY.

PANTOGRAPH APPARATUS.

APPLICATION man FEB. 1, 191B.

Patented Feb. 28, 1922.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GEORGE S. TIFFANY, OF SUMMIT, NEW JERSEY, ASSIGNOR TO TELAUTOGRAPH CORPO- RATION, OF RICHMOND, VIRGINIA, A CORPORATION OF VIRGINIA.

PAN'TOGRAPH APPARATUS.

I IGSM IEF.

To all whom it may concern:

Be it known that I, GEORGE S. TIFFANY, a citizen of the United States, residing at Summit, county of Union, and State of New Jersey, have invented certain new and useful Improvements in Pantograph Apparatus, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to improvements in pantographs designed particularly for use in connection with machines for projecting the writings of the pantograph upon a screen, bulletin-board, or the like.

In the accompanying drawing Figure 1 is a plan view of a pantograph embodying the improvements of the present invention.

Figure 2 is a side elevation of the same.

In said drawing, 1 represents the base of the machine, 2 what may be termed the transmitting instrument, and 3 the receivlng instrument. The former is equipped with a tracer 4 and the latter with a. receiving pen The tracer is pivotally mounted in one end of an arm 6, the opposite end of which is pivotally mounted on a stud 7, secured to a sleeve 8. The receiving pen 5 is similarly mounted in an arm 9 pivoted at its opposite end in a stud 10 secured to said sleeve 8. Arms 6, 9 are connected by a link 8, so that the lateral movements of the transmltting tracer will be transmitted to the receiving pen 5, the pivotal connection between arms 6, 9 permitting of such movement. Sleeve 8 is provided with a shaft 11 free to rotate therein and having secured to its opposite ends pinions 12, 13, engaging racks 14, 15, respectively, secured to base 1 or an extension thereof. The outer ends of shaft 11 projcct into slots provided in guard plates 16, 1'? secured to base 1; the purpose of this connection being to retain the pinions 12, in engagement with the racas 1d, 15. From the foregoing, it will be understood that as the transmitting tracer at is moved laterally as in ordinary writing movements, the receiving pen will be correspondingly moved in the same direction and to the same extend because of the link connection 8 between the arms 6, 9. It will also be understood Specification of Letters Patent. Pat t d F 28 1922' Application filed. February 1, 1918.

Serial No. 214,854.

that as the transmitting tracer is moved up and down its writing surface or field, the receiving pen will be correspondingly moved to the same extent in a direction crosswise of the line of writing, because of the engagement of the pinions 12, 13 on shaft 11. with their respective racks 1 1-, 15. This shaft is parallel with the line of writing and throughout its movements up and dawn in the crosswise direction referred to, it is retained in this position. of parallelism. This is true also of the sleeve 8.

The movement of the receiving pen to and from its writing surface is controlled. from the transmitting tracer I, the raising and lowerlng of which from or towards its writing surface results in rotary motion of sleeve 8, and, therefore, in the movement of the receiving pen 5 to or from its writing surface.

The transmitting apparatus is provided with paper supplying and feeding means consisting of a web of paper 20 suitably supported in a bracket 21 depending from the basel, from which the paper passes over the writing platen 22 and thence downwardly around atake-up spool on a shaft 23 journaled in a bracket 24- depending from base 1, this shaft being provided with aknurled handle 25 by which it may be turned and the paper shifted over the writing platen 22, whenever a fresh spool of paper is required.

What I claim is:

In a pantographic apparatus the combina tion of a support having two writing fields,

a-tracer in one field, a receiving pen in the other, a carrier movable on the support transversely to the writing fields. pinions on said carrier and racks on the support engaged thereby whereby the carrier is maintained parallel to the writing fields, rods pivotally connected at their rear ends to the carrier, one carrying the tracer and the other the receiving pen in their front ends, and a rod pivotally connectedwith said rods intermediate. their ends whereby the lateral movements of the tracer are transmitted to the pen.

' In testimony whereof, I have hereunto set my hand.

GEORGE S. TIFFANY. 

